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02-client-tools.md

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Installing the Client Tools

In this lab you will install the command line utilities required to complete this tutorial: cfssl, cfssljson, kubectl, and jq.

Install CFSSL

The cfssl and cfssljson command line utilities will be used to provision a PKI Infrastructure and generate TLS certificates.

Download and install cfssl and cfssljson from the cfssl repository:

OS X

curl -o cfssl https://pkg.cfssl.org/R1.2/cfssl_darwin-amd64
curl -o cfssljson https://pkg.cfssl.org/R1.2/cfssljson_darwin-amd64

chmod +x cfssl cfssljson

sudo mv cfssl cfssljson /usr/local/bin/

Some OS X users may experience problems using the pre-built binaries in which case Homebrew might be a better option:

brew install cfssl

Linux

wget -q --show-progress --https-only --timestamping \
  https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 \
  https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64

chmod +x cfssl_linux-amd64 cfssljson_linux-amd64

sudo mv cfssl_linux-amd64 /usr/local/bin/cfssl

sudo mv cfssljson_linux-amd64 /usr/local/bin/cfssljson

Verification

Verify cfssl version 1.2.0 or higher is installed:

cfssl version

output

Version: 1.2.0
Revision: dev
Runtime: go1.6

The cfssljson command line utility does not provide a way to print its version.

Install kubectl

The kubectl command line utility is used to interact with the Kubernetes API Server. Download and install kubectl from the official release binaries:

OS X

curl -o kubectl https://storage.googleapis.com/kubernetes-release/release/v1.17.2/bin/darwin/amd64/kubectl

chmod +x kubectl

sudo mv kubectl /usr/local/bin/

Linux

wget https://storage.googleapis.com/kubernetes-release/release/v1.17.2/bin/linux/amd64/kubectl

chmod +x kubectl

sudo mv kubectl /usr/local/bin/

Verification

Verify kubectl version 1.17.2 or higher is installed:

kubectl version --client

output

Client Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.2", GitCommit:"59603c6e503c87169aea6106f57b9f242f64df89", GitTreeState:"clean", BuildDate:"2020-01-23T14:21:36Z", GoVersion:"go1.13.6", Compiler:"gc", Platform:"darwin/amd64"}

Install jq

(because Digital Ocean doesn't have any nice output filtering on resource creation)

for non-standard systems, follow the instructions here.

OS X

brew install jq

Linux (on ubuntu/debian...for other distros see the link above)

sudo apt-get install jq

Verification

jq --version

output

jq-1.5-1-a5b5cbe

Next: Provisioning Compute Resources